sthefanyvitoria
sthefanyvitoria
16-03-2017
Mathematics
contestada
x²- 6x + 9=16 A solução?
Respuesta :
apologiabiology
apologiabiology
16-03-2017
Torná-lo igual a 0
x
²-6x+9=16
x²-6x-7=0
fator
Encontrar o que 2 números se multiplicam para obter -7 e adicionar para obter -6
-7 e 1
(x-7)(x+1)=0
Definir cada um igual a 0 e resolver para x
x-7=0
x=7
x+1=0
x=-1
x=-1 e 7
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